The musician was a founding member of the influential '60s psychedelic band. In 2009, he worked with Smashing Pumpkins frontman Billy Corgan and briefly replaced touring bassist Ginger Pooley at one live show.

A Facebook post from USC Catalina Hyperbaric Chamber read: "It is with deep sadness and a very heavy heart that I inform you of the death of Mark Tulin.

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"He collapsed today while helping out at the Avalon Underwater Clean-Up and had immediate response by Baywatch Avalon and Avalon Fire Department medics, but he could not be revived.
Mark was one-of-a-kind. His energy, generosity, and spirit was unmatched."

A second post read: "Services for Mark will be held at Mount Sinai Memorial Park - Hollywood Hills on Friday March 4th at 2pm."